NEET · Physics · STD 12 - 2. Electric potential and capacitance
A capacitor of \(2\,\, \mu F\) is charged as shown in the diagram. When the switch \(S\) is turned to position \(2,\) the percentage of its stored energy dissipated is ......\(\%\)
- A \(20\)
- B \(75\)
- C \(80\)
- D \(0\)
Answer & Solution
Correct Answer
(C) \(80\)
Step-by-step Solution
Detailed explanation
Initially, the energy stored in \(2 \,\mu F\) capacitor is \(U_{i}=\frac{1}{2} C V^{2}=\frac{1}{2}\left(2 \times 10^{-6}\right) V^{2}=V^{2} \times 10^{-6}\, \mathrm{J}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A horizontal force \(10 \mathrm{~N}\) is applied to a block \(A\) as shown in figure. The mass of blocks \(A\) and \(B\) are \(2 \mathrm{~kg}\) and \(3 \mathrm{~kg}\) respectively. The blocks slide over a frictionless surface. The force exerted by block \(A\) on block \(B\) is :
NEET 2024 Medium - A capillary tube of radius \(r\) is immersed in water and water rises in it to a helght \(h\). The mass of the water in the capillary is \(5\,g.\) Another capillary tube of radlus \(2\, r\) is immersed in water. The mass of water that will rise in this tube is \(........\;g\)NEET 2020 Medium
- The magnetic field of a plane electromagnetic wave is given by \(\overrightarrow{ B }=3 \times 10^{-8} \cos \left(1.6 \times 10^3 x +48 \times 10^{10} t \right) \hat{ j }\), then the associated electric field will be :NEET 2022 Medium
- A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :NEET 2021 Medium
- A mass \(m\) is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break whenNEET 2019 Medium
- When an \(\alpha -\)particle of mass \(m\) moving with velocity \(v\) bombards on a heavy nucleus of charge \(Z_e\) , its distance of closest approach from the nucleus depends on \(m\) asNEET 2016 Medium
More PYQs from NEET
- Strobili or cones are found inNEET 2020 Medium
- Number of isomeric alcohols of molecular formula \(C_6H_{14}O\) which give positive iodoform test isNEET 2013 Hard
- A gravitational field is present in a region and a mass is shifted from \(A\) to \(B\) through different paths as shown. If \(W _1, W _2\) and \(W _3\) represent the work done by the gravitational force along the respective paths, then
NEET 2022 Easy - Two toroids \(1\) and \(2\) have total number of tums \(200\) and \(100 \) respectively with average radii \(40\; \mathrm{cm}\) and \(20 \;\mathrm{cm}\) respectively. If they carry same current \(i,\) the ratio of the magnetic flelds along the two loops isNEET 2019 Medium
- How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant?NEET 2025 Medium
- In the following circuit, the equivalent capacitance between terminal \(A\)and terminal \(B\) is :
NEET 2024 Medium